Pyridoxine-phosphate is a vitamer of Vitamin B6. In man vitamin B(6) ingested from the diet exists as six different vitamers, pyridoxal (PL), pyridoxamine (PM), pyridoxine (PN), pyridoxal 5'-phosphate (PLP), pyridoxamine 5'- phosphate (PMP) and pyridoxine 5'-phosphate (PNP). It is a substrate for pyridoxine-5'-phosphate oxidase (PNPO) and pyridoxal phosphate phosphatase (PDXP). PNPO deficiency is responsible of severe neonatal encephalopathy.

Piperidine is a normal constituent in mammalian brain. It was shown to affect synaptic mechanism in the CNS, and influence neural mechanisms governing regulation of emotional behavior, sleeping, and extrapyramidal function. In addition, there are enzyme systems within the brain that synthesize and metabolize piperidine, and uptake and storage mechanisms for piperidine are found in the nerve endings. Piperidine, which proved to be a highly effective “antipsychotomimetic” agent in rats, has been reported to bring about substantial improvement in a variety of schizophrenic patients.